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Finding the Fourth Proportional to 85,325.10, 127,990.89 and 32,739.90

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Solution

The fourth proportional to 85,325.10, 127,990.89 and 32,739.90 is: 49,111.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,325.10 : 127,990.89 = 32,739.90 : x
  2. Step 2: Convert to fraction form
    85,325.10/127,990.89 = 32,739.90/x
  3. Step 3: Cross multiply
    85,325.10x = 127,990.89 × 32,739.90
  4. Step 4: Simplify right side
    85,325.10x = 4,190,408,939.51
  5. Step 5: Solve for x
    x = 4,190,408,939.51/85,325.10
  6. Step 6: Final answer
    x = 49,111.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.